Greater London · England
Sand mastic for sash & case windows in Nine Elms, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Nine Elms, with a one-year guarantee on every job. Call for a quick quote.
- Cracked mastic round a front door frame
- Window mastic to renew ahead of painting
- Open joints round the window box
Aftercare tips
So the new joints stay in good condition:
- Keep sills and gutters clear so water drains away
- Have rotten timber repaired before new mastic goes in
- Find out about consent before window work on a listed home
- Inspect the joints round the windows every year or so
Leave the new mastic alone while it firms up. It forms a skin fairly soon but needs longer to fully harden.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Sand mastic in Nine Elms, done properly
Sand mastic does not last for ever, leaving gaps round the window. We rake it out and renew it and tidies the surround. We work on timber door frames, stone surrounds and brick reveals, and people most often call us about silicone on a period window that looks wrong and mastic that needs renewing before redecorating.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
You are covered for a year from the day we finish. If anything isn’t right with it, call 0345 464 0079 or send us an email.
- Place
- Nine Elms (SW1V, SW8, SW11)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Stone surrounds
The stone is treated with care while raking out the old mastic.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Nine Elms questions
Is parking an issue for sand mastic in Nine Elms?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Is Nine Elms in your area for sand mastic?
Yes. Our work covers London and the South East, and Nine Elms is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we’ll advise.
Are you insured?
Yes, we’re fully insured for domestic and commercial work.
Should I check with the council before work on a listed or conservation-area home?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like, but they decide.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. The old silicone has to come out completely so the mastic can sit properly.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
How much does sand mastic cost in Nine Elms?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
What sealant work can’t fix
Before booking, it’s worth knowing the limits too:
- Timber that has rotted
- Sash cords, weights and draught-proofing of the sashes
- Broken panes
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before booking.
What we seal
- Period & listed homes
- Sash and case windows
- Brick reveals
- Tenement windows
- Stone surrounds
- Timber door frames
Nine Elms homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. With historic houses such as Carlyle's House (about 1.1 miles west) nearby, there’s older building stock in the area around Nine Elms as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Nine Elms is in London, so parking needs planning: let us know about parking bays, permits or a driveway. For site and facilities teams at buildings such as St Gabriel's CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Nine Elms is about 1 mile south of Victoria, in Greater London. For sand mastic in and around Nine Elms, please phone 0345 464 0079 or drop us an email for a quick quote. We cover Greater London from our Crawley base, Nine Elms included. Nine Elms is one of 764 towns and villages in Greater London where we work for sand mastic.
Postcode districts we cover here for sand mastic: SW1V, SW8 and SW11. Whether your property is on Cupar Road, Ponton Road and Macduff Road or anywhere close by, our applicators can take on the job. With the A3212 and A3216 close by, Nine Elms is simple for us to get to for sand mastic. Close by, we work in Pimlico (1 mile north-east), Victoria (1 mile north), South Lambeth (1 mile east), Chelsea (1 mile north-west) and Kennington (1 mile east). We also work in nearby towns such as Kensington (3 miles north-west), St Pancras (3 miles north), Shoreditch (4 miles north-east), Walthamstow (9 miles north-east), Hoxton (4 miles north-east) and Whitechapel (4 miles north-east).
Near you in Nine Elms
Around Nine Elms, our work takes us to homes and buildings near Pimlico Academy, Sir Simon Milton Westminster UTC and Lambeth Palace Library and the streets around them. Also close by are Pimlico Gardens (0.5 miles north-east) and The King William IV pub (within half a mile north-east). There’s a railway station in Nine Elms itself: Battersea Park station. Nearby you will also find Harrods (1.5 miles north-west) and Royal Hospital Chelsea (0.7 miles north-west). For a walk, there’s Battersea Park Lake and Campden Hill.
What happens on the day
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
Getting a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.
Advice
Landlords, agents and businesses in Nine Elms
For anyone letting property in or around Nine Elms, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Places near Nine Elms
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When to call us in Nine Elms
Some old mastic was never deep enough. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Look out for these signs:
- Crumbling sand mastic round a window
- Draughty sash windows at the surround
- Mastic that needs renewing before redecorating
- Patchy fillers round a sash window
For an older house near a landmark such as All Saints, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- How the colour is chosen
- How long the guarantee is
- Who does the work, and how experienced they are
- What happens if the job turns out different
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Nine Elms.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why Nine Elms clients choose us
- Domestic, commercial and hotel work
- 180+ five-star Google reviews
- Trusted Arbo and Everbuild sealants
- Approved under the ARBOMaster scheme
Take a look at how sealant jobs are priced and our reviews.